194991315 has 8 divisors (see below), whose sum is σ = 311986128. Its totient is φ = 103995360.

The previous prime is 194991311. The next prime is 194991317. The reversal of 194991315 is 513199491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 194991315 - 2² = 194991311 is a prime.

It is a super-2 number, since 2×194991315² = 76043225850858450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194991311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6499696 + ... + 6499725.

It is an arithmetic number, because the mean of its divisors is an integer number (38998266).

Almost surely, 2^194991315 is an apocalyptic number.

194991315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

194991315 is a deficient number, since it is larger than the sum of its proper divisors (116994813).

194991315 is a wasteful number, since it uses less digits than its factorization.

194991315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999429.

The product of its digits is 43740, while the sum is 42.

The square root of 194991315 is about 13963.9290674222. The cubic root of 194991315 is about 579.8803905158.

The spelling of 194991315 in words is "one hundred ninety-four million, nine hundred ninety-one thousand, three hundred fifteen".